I can never pick up a thing without wishing to improve it.

I never did anything worth doing entirely by accident. . . Almost none of my inventions came about totally by accident. They were achieved by having trained myself to endure and tolerate hard work.

For faith, as well intentioned as it may be, must be built on facts, not fiction - faith in fiction is a damnable false hope.

Of the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.

Genius is one percent inspiration and ninety-nine percent perspiration. As a result, a genius is often a talented person who has simply done all of his homework.

Being busy does not always mean real work.

Incurably religious, that is the best way to describe the mental condition of so many people.